RE: [avr-libc-dev] Nice to have: XCK Definition

[Weddington, Eric]

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Frédéric Nadeau
> Sent: Friday, March 13, 2009 6:55 AM
> To: address@hidden
> Subject: Re: [avr-libc-dev] Nice to have: XCK Definition
> 
> I'm looking at the two USB definition that are missing iousbxx2.h and
> iousbxx6_7.h to add pin definition by hand. I'm stuck with the
> following dilemma:
> 
> In data sheet for  AT90USB646 as well as the one for AT90USB82, Clock
> pin for the SPI module is name in the pin description section as SCLK
> where as in the rest of the datasheet(specially in the SPI section) it
> is refered as SCK. All other devices that I know of use SCK for SPI
> clock.
> 
> It is not much of a problem for AT90USB646, but AT90USB82 also
> implement a PS/2 module, witch in his turn define a pin as SCK.
> 
> So datasheets are not consistent on SCK Vs SCLK for SPI clock.
> 
> If it were only of me I would rename SPI clock pin to SCK for both and
> rename SCK to SCLK for PS/2 module in AT90USB82 case. But I'm not the
> one writing the datasheet. Although they do have job openings in Ulm
> and Heilbronn, but my German skill are only at B1 level :(
> 

Keep it consistent and do SCK across all devices. Send an email to atmel about 
their datasheet inconsistencies.